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Arman, Hadi
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article
Cadmium (II) metal–organic architecture based on versatile multi‐N‐donor “3,5‐diaminotriazole” and dicarboxylate spacer: Synthesis, crystal structure, and its photocatalytic degradation of organic dye
Abstract
<jats:p>Herein, we have designed polyfunctional materials of d<jats:sup>10</jats:sup>‐configuration Cd (II) “<jats:bold>Cd‐CP</jats:bold>.” The coordination polymer <jats:bold>Cd‐CP</jats:bold> was synthesized using benzene‐1,4‐dicarboxylic acid and 3,5‐diaminotriazole via solvothermal reaction. The <jats:bold>Cd‐CP</jats:bold> has been fully characterized by using single X‐ray crystallography, thermogravimetric analysis (TGA), Fourier transform–infrared (FT‐IR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), powder X‐ray diffraction (PXRD), and Brunauer–Emmett–Teller (BET) analysis. Single crystal X‐ray crystallography revealed that the <jats:bold>CP‐Cd</jats:bold> crystallized in triclinic space group <jats:italic>P</jats:italic> – 1 with the chemical composition [(BDC)(DAT)<jats:sub>2</jats:sub>Cd<jats:sub>2</jats:sub>Cl] (CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub> NH<jats:sub>2</jats:sub><jats:sup>+</jats:sup> · H<jats:sub>2</jats:sub>O. The present study investigated the impact of different reaction parameters, including the concentration of MG, the dosage of catalyst, and the duration of irradiation, on the outcome demonstrating a high level of photocatalytic efficacy at 99.19% under visible light irradiation. The obtained kinetic data exhibited conformity with a pseudo‐first‐order model, indicating that the rate‐determining step is likely to be photo‐absorption. The value of the apparent rate constant was found to be 0.019 min<jats:sup>−1</jats:sup> for 50 mg L<jats:sup>−1</jats:sup>, 0.016 min<jats:sup>−1</jats:sup> for 100 mg L<jats:sup>−1</jats:sup>, and 0.015 min<jats:sup>−1</jats:sup> for 150 mg L<jats:sup>−1</jats:sup> MG concentration. The corresponding half‐life time was found to be 36.44, 43.31, and 46.20 min with values of correlation coefficient (<jats:italic>R</jats:italic><jats:sup>2</jats:sup>) as 0.99, 0.93, and 0.98, respectively. Moreover, a trapping experiment was conducted to demonstrate that hydroxy radicals (•OH) are the principal reactive oxygen species (ROS) responsible for the degradation of MG. The results of the total organic carbon (TOC) study indicated a mineralization value of around 89%, suggesting that the dye has been completely degraded into non‐toxic by‐products such as carbon dioxide (CO<jats:sub>2</jats:sub>) and water (H<jats:sub>2</jats:sub>O).</jats:p>